Travis is an attempt to create an open-source, distributed build system for the Ruby community that allows open-source projects to register their repository and have their test-suites run on demand, and allows users to contribute build capacities by connecting a VM that runs a build agent somewhere on their underused servers.

Firewall is an IP firewall that is baked inside of your Rails3 application. Through a yaml file in your config directory you can white and blacklist by ip address and address ranges, for each rails environment you set up.

Compass-Magic is a plugin for the Compass css authoring framework that provides some bifty features with RMagick/ImageMagick, including things like image cropping, resizing, image composing, and other cool things. If you've used compass, you've probably run across a scenario where a change in the css would best be accompanied by a tweak to an image. Now you can do just that.

Lumberjack is a drop in replacement for Ruby's Logger class. It adds a few pieces of metadata, such as the process name and ID that generated the event; most interestingly, there is a 12 digit hex code logged with the statement that represents the 'unit of work', or code scope that generated the log. If you've ever had to dissect a busy log file where several related log statements are scattered because of multiple logging processes, this ID can help you reassemble the logs by process that created them.